diff --git a/.vscode/settings.json b/.vscode/settings.json
index 4ec7b65..6312ae5 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,5 @@
 {
+  "window.autoDetectColorScheme": false,
   "editor.tabSize": 2,
   "editor.semanticTokenColorCustomizations":{
       "enabled": true, // enable semantic highlighting for all themes
@@ -22,15 +23,15 @@
     "activityBar.inactiveForeground": "#15202b99",
     "activityBarBadge.background": "#cfd3ef",
     "activityBarBadge.foreground": "#15202b",
-    "titleBar.activeBackground": "#5e7959",
-    "titleBar.inactiveBackground": "#5e795999",
-    "titleBar.activeForeground": "#e7e7e7",
-    "titleBar.inactiveForeground": "#e7e7e799",
     "statusBarItem.hoverBackground": "#759570",
     "statusBar.foreground": "#e7e7e7",
     "activityBar.activeBackground": "#759570",
     "statusBar.background": "#5e7959",
     "statusBar.border": "#5e7959",
+    "titleBar.activeBackground": "#5e7959",
+    "titleBar.inactiveBackground": "#5e795999",
+    "titleBar.activeForeground": "#e7e7e7",
+    "titleBar.inactiveForeground": "#e7e7e799",
     "titleBar.border": "#5e7959"
   },
   "go.languageServerFlags": [],
diff --git a/resiliency/06_circuit_breaker/circuit_breaker_adv.go b/resiliency/06_circuit_breaker/circuit_breaker_adv.go
index 15e9acd..ed01163 100644
--- a/resiliency/06_circuit_breaker/circuit_breaker_adv.go
+++ b/resiliency/06_circuit_breaker/circuit_breaker_adv.go
@@ -82,33 +82,32 @@ func (rb *RequestBreaker) Do(work func(ctx context.Context) (interface{}, error)
 
 	//before
 	fmt.Println("before do : request:", rb.cnter.Total())
-
 	rb.mutex.Lock()
-	//handle status of Open to HalfOpen
-	if rb.state == StateOpen && rb.options.Expiry.Before(time.Now()) {
-		rb.state = StateHalfOpen
-		rb.cnter.Reset()
-		rb.options.OnStateChanged(rb.options.Name, StateOpen, StateHalfOpen)
-	}
-	rb.mutex.Unlock()
-
 	switch rb.state {
 	case StateOpen:
 		return nil, ErrTooManyRequests
 	case StateHalfOpen:
 		//do work from requested user
-		result, err := work(rb.options.Ctx)
-		if err != nil {
-			rb.cnter.Count(FailureState)
+		//	result, err := work(rb.options.Ctx)
+		// if err != nil {
+		// 	rb.cnter.Count(FailureState)
+		// } else {
+		// 	rb.cnter.Count(SuccessState)
+		// 	return result, nil
+		// }
 
-		} else {
-			rb.cnter.Count(SuccessState)
-			return result, nil
+		if rb.options.Expiry.Before(time.Now()) {
+			rb.state = StateHalfOpen
+			rb.cnter.Reset()
+			rb.options.OnStateChanged(rb.options.Name, StateOpen, StateHalfOpen)
 		}
 
 	case StateClosed:
 	}
 
+	rb.mutex.Unlock()
+
+	//do work
 	//do work from requested user
 	result, err := work(rb.options.Ctx)